Tire-pump.



G. H. PATTENf TIRE PUMPr APPLICATION FILED MAY 19, 1917.

Patented Oct. 23, 1917.

I 3140c M50;

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TIRE-PUMP- To all'whom iii/may concern Be it known that I, Gnoiien H. PATTEN; a citiren of the United States, residing at Chattanooga, the county ofHamiltoii' and State of Tennessee, have inventednew and useful" Improvements in ,'Tire-'l?umps, of which the following is a siiiecification. 1

This invention relates 1 to tire pumps adapted for use with automobile and other tires; and the primary object of the same is to provide meansin connection with the pump barrel to cause the aris' of the "latter and the plunger to followthe natural oscillation of the body of the operator as the plunger is recip'rocat'ed duringthe pumping action" and whereby a more positive "and forceful strokemay be given to theplunger and reduction of wear on thefbea'ring cap or hearing devicelfor the" plunger rod or stem is reduced to. minimum'and at the same time the operation of the pump "is effected with 'les's tiresome exertionupon the operator. With these and. other objects and advantages in view the'i'nvention consists in the construction and arrangement of the several parts which will be more fully hereinafter described and claimed.

In the drawing:

Figure 1 is a side elevation of a' tire pump embodying the features'of the invention.

Fig. 2 isan enlarged velevatiqn of the ordinary air pump having a bearing cap 6 applied to the upper end and a support 7 secured to the lower end. The pump barrel will have the usual air inlet and other pumping attachments, and within the same is mounted a plunger 8 to which is attached a rod or stem 9 which extends through the bearing cap 6 and is provided with an upper handie or grip 10. The base support 7 embodies the features of the improvement and consists of a semicircular pressure member-'11 having a fulcrum rib 12 extending longitudinally of the center of the bottom portion thereof, the fiat side of the semicircular pressure member forming the main bottom portion of the support or base and the curved part, of the.

' sbesa fiene e sie en e 0 1 231 1 7.- epplication ii ledlvlay19,1917; SerialNoJlSQfilS.

latter stands uppermost for engagement by the foot ofthe operator. The pressure member 11, extends equally in opposite directions relatively to the center or axis of the pump barrel '5 and the fulcrum rib 12 is reduced towarditslower edge 18, the said edgefbeing rounded, "as clearly shown'by' Fig: 2. Preferably the opposite ends of the fulcrum rib 12 are cut away" at a downw'ard'and inward angle ofin'clination as atl l, to give a clearance at the opposite ends of the-rib and provide for a more sensitive rocking action thereof without resistance of corners or angles that wouldbecome worn if'the said rib extended out in planes at right angles to the under flatside of thepressure nally of the center thereof. I

f The operationof the improved pump-in either of its cforms is very simple, and'when it is'desired touse" the pump in inflating a tire the rib 12 is disposed upon a support which may be a 'road 'or street surfacebr other means upon which an automobile having the tire needing inflation is resting. The support or base is also held adjacent to the tire to be inflated and the operator places either foot upon the upper curved surface of the pressure member 11 at one side of the barrel 5 and then proceeds to reciprocate the rod or stem 9 to actuate the plunger 8 to pump the air into the tire. During the pumping action the barrel 5 together with the plunger 8 and the rod or stem 9 will follow the natural oscillation of the body as the plunger and its rod are vertically reciprocated, and by this means a and positive force may be applied to the plunger and rod or stem with less tiring eflect upon the operator and with more favorable results in inflating tires. As hereinbefore noted wear on the parts of the pump and particularly the plungerand the bearing cap is reduced to. a minimum in view of the fact that there is no irregullr b111d* direct ing set up between the several parts during the actuation of the pump and particularly between the rod or stem 9 and the cap 6. Moreover, bending or distortion of the rod or stem 9 is less liable to occur in view'of the fact that the barrel 5 will always assume the proper angle relatively to the line of draft or the pushing force exerted on the plunger 8 and rod or stem 9.

Another verymaterial advantage of the improved pump is that the usual leather washer of the piston 8 will be prevented from becoming irregularly worn as in the ordinary pump structures embodying rigid barrelsor bodies and wherein one portion of the washer is worn to a greater extent than the remaining portion by reason of the irregular pull exerted on the plungeror pistonand rod therefor. By means of the improved pump hereinbefore disclosed the pulling and pushing stress on the plunger or piston will be'uniform or central with regard to the latter andtherefore the washer will be regularly worn and will not be'subject to the disadvantages incident to imposing greater wear on portions thereof than on other portions of the same. 7

It will be understood that the parts of the improved tire pump will be made of suitable metal torender the same strong and durable and it is obvious that the upper curved surface of the pressure member will give 7 an easy movement of the support or base of the pump relatively to the foot of the operator during the oscillation of the pump as an entirety.

In the operation of the modified construction as shown by Fig. 3 the foot of the operator is inserted through the stirrup l5 and rests on the pressure member 11, the upper Gopies of this patent may be obtained for surface of the pressure member being semicircular and the stirrup large enough to permit free movement of the base support relatively to the operators foot.

What is claimed as new is:

' '1. A tire'pump comprising abarrel having a plunger and rod or stem, and a base support embodying a pressure member with an upper curved'surface and a lower rib extending longitudinally thereof at the ce ter to form a fulcrum means for permitting the axis of the pump barrel and plunger to follow the natural oscillation of the bodyof the operator as the plunger is actuated.

2. A tire pump of the classspecified comprising a barrel having a'plunger and rod or stem, and a base support having a centrally disposed fulcrum rib to permit an oscillation of the pump during its operation.

3. A tire pump of the class specified comprising a barrel with a plunger and rod or stem cooperatingtherewith, and a base support embodying a semicircular pressure member having a rib extending longitudinally of the center of the bottom portion thereof to serve as the fulcrum means.

a. A tire pump of the class specified comprising a pump barrel having a plunger and rod or stem cooperating therewith, and a basesupport embodying a stirrup having a pressure member with a lower longitudis nally disposed fulcrum rib at the center thereof. V

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE H. PATTEN. Witnesses:

C. A. LAND, Jr, .W.'H. SELINGER.

five cents each, by addressing the Commissioner 01 IEzitentg. Washington, D. G. I 

